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-rw-r--r--erts/emulator/beam/beam_emu.c47
-rw-r--r--erts/emulator/beam/beam_load.c27
-rw-r--r--erts/emulator/beam/ops.tab9
3 files changed, 83 insertions, 0 deletions
diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c
index ea813ef09f..afba17f7bd 100644
--- a/erts/emulator/beam/beam_emu.c
+++ b/erts/emulator/beam/beam_emu.c
@@ -1882,6 +1882,53 @@ void process_main(void)
NextPF(0, next);
}
+
+ {
+ Eterm select_val2;
+
+ OpCase(i_select_tuple_arity2_yfAfAf):
+ select_val2 = yb(Arg(0));
+ goto do_select_tuple_arity2;
+
+ OpCase(i_select_tuple_arity2_xfAfAf):
+ select_val2 = xb(Arg(0));
+ goto do_select_tuple_arity2;
+
+ OpCase(i_select_tuple_arity2_rfAfAf):
+ select_val2 = r(0);
+ I--;
+
+ do_select_tuple_arity2:
+ if (is_not_tuple(select_val2)) {
+ goto select_val2_fail;
+ }
+ select_val2 = *tuple_val(select_val2);
+ goto do_select_val2;
+
+ OpCase(i_select_val2_yfcfcf):
+ select_val2 = yb(Arg(0));
+ goto do_select_val2;
+
+ OpCase(i_select_val2_xfcfcf):
+ select_val2 = xb(Arg(0));
+ goto do_select_val2;
+
+ OpCase(i_select_val2_rfcfcf):
+ select_val2 = r(0);
+ I--;
+
+ do_select_val2:
+ if (select_val2 == Arg(2)) {
+ I += 2;
+ } else if (select_val2 == Arg(4)) {
+ I += 4;
+ }
+
+ select_val2_fail:
+ SET_I((BeamInstr *) Arg(1));
+ Goto(*I);
+ }
+
{
Eterm select_val;
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c
index 02aef95a52..2d57c8a218 100644
--- a/erts/emulator/beam/beam_load.c
+++ b/erts/emulator/beam/beam_load.c
@@ -2978,6 +2978,21 @@ gen_select_tuple_arity(LoaderState* stp, GenOpArg S, GenOpArg Fail,
ASSERT(op->a[i].val < op->a[i+2].val);
}
#endif
+
+ /*
+ * Use a special-cased instruction if there are only two values.
+ */
+ if (size == 2) {
+ op->op = genop_i_select_tuple_arity2_6;
+ op->arity--;
+ op->a[2].type = TAG_u;
+ op->a[2].val = arityval(op->a[3].val);
+ op->a[3] = op->a[4];
+ op->a[4].type = TAG_u;
+ op->a[4].val = arityval(op->a[5].val);
+ op->a[5] = op->a[6];
+ }
+
return op;
}
@@ -3228,6 +3243,18 @@ gen_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
}
#endif
+ /*
+ * Use a special-cased instruction if there are only two values.
+ */
+ if (size == 2) {
+ op->op = genop_i_select_val2_6;
+ op->arity--;
+ op->a[2] = op->a[3];
+ op->a[3] = op->a[4];
+ op->a[4] = op->a[5];
+ op->a[5] = op->a[6];
+ }
+
return op;
}
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab
index 04e2e72b0d..6db55e1402 100644
--- a/erts/emulator/beam/ops.tab
+++ b/erts/emulator/beam/ops.tab
@@ -160,6 +160,15 @@ select_tuple_arity S=d Fail=f Size=u Rest=* => \
i_select_val r f I
i_select_val x f I
i_select_val y f I
+
+i_select_val2 r f c f c f
+i_select_val2 x f c f c f
+i_select_val2 y f c f c f
+
+i_select_tuple_arity2 r f A f A f
+i_select_tuple_arity2 x f A f A f
+i_select_tuple_arity2 y f A f A f
+
i_select_tuple_arity r f I
i_select_tuple_arity x f I
i_select_tuple_arity y f I